Revert "LUTECE-2067 : ehcache upgrade 2.4.8 -> 2.10.3"
Revert "LUTECE-2067 : ehcache upgrade 2.4.8 -> 2.10.3"

This reverts commit 62951c47a6842db621659116c81ff3fd4d7c43bd.

The deadlocks have returned on a website using the cache a lot through
plugin-myportal's widgets. Here are some thread dumps, abriviated for
clarity. The full thread dumps are available on jira LUTECE-2067

~150 threads like this :

"http-nio-8080-exec-199" #257 daemon prio=5 os_prio=0 tid=0x00007f661415d800 nid=0x6f7e in Object.wait() [0x00007f65d3de1000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap$Node.tryAwaitLock(ConcurrentHashMap.java:687)
	- locked <0x00000005c591cd40> (a net.sf.ehcache.util.concurrent.ConcurrentHashMap$Node)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.internalReplace(ConcurrentHashMap.java:1311)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:2643)
	at net.sf.ehcache.store.cachingtier.CountBasedBackEnd.evictIfRequired(CountBasedBackEnd.java:149)
	at net.sf.ehcache.store.cachingtier.CountBasedBackEnd.putIfAbsent(CountBasedBackEnd.java:87)
	at net.sf.ehcache.store.cachingtier.OnHeapCachingTier.get(OnHeapCachingTier.java:172)
	at net.sf.ehcache.store.CacheStore.get(CacheStore.java:192)
	at net.sf.ehcache.Cache.get(Cache.java:1751)
	at net.sf.ehcache.Cache.get(Cache.java:1724)
	at fr.paris.lutece.portal.service.cache.AbstractCacheableService.getFromCache(AbstractCacheableService.java:121)
	at fr.paris.lutece.plugins.myportal.service.WidgetContentService.getWidgetContent(WidgetContentService.java:114)

   Locked ownable synchronizers:
	- <0x00000005d08c23f0> (a java.util.concurrent.ThreadPoolExecutor$Worker)

~15 threads like this:

"http-nio-8080-exec-146" #204 daemon prio=5 os_prio=0 tid=0x00007f662022c800 nid=0x6f44 in Object.wait() [0x00007f65d7316000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap$Node.tryAwaitLock(ConcurrentHashMap.java:687)
	- locked <0x00000005c554a6c0> (a net.sf.ehcache.util.concurrent.ConcurrentHashMap$Node)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.internalReplace(ConcurrentHashMap.java:1311)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.removeAndNotify(ConcurrentHashMap.java:2647)
	at net.sf.ehcache.store.cachingtier.CountBasedBackEnd.remove(CountBasedBackEnd.java:115)
	at net.sf.ehcache.store.cachingtier.OnHeapCachingTier.remove(OnHeapCachingTier.java:206)
	at net.sf.ehcache.store.CacheStore.remove(CacheStore.java:238)
	at net.sf.ehcache.Cache.removeInternal(Cache.java:2425)
	at net.sf.ehcache.Cache.remove(Cache.java:2330)
	at net.sf.ehcache.Cache.remove(Cache.java:2248)
	at net.sf.ehcache.Cache.remove(Cache.java:2226)
	at fr.paris.lutece.portal.service.cache.AbstractCacheableService.notifyElementExpired(AbstractCacheableService.java:277)
	at net.sf.ehcache.event.RegisteredEventListeners.internalNotifyElementExpiry(RegisteredEventListeners.java:268)
	at net.sf.ehcache.event.RegisteredEventListeners.notifyElementExpiry(RegisteredEventListeners.java:242)
	at net.sf.ehcache.store.disk.Segment.evict(Segment.java:903)
	at net.sf.ehcache.store.disk.Segment.evict(Segment.java:831)
	at net.sf.ehcache.store.disk.Segment.flush(Segment.java:1035)
	at net.sf.ehcache.store.disk.DiskStore.flush(DiskStore.java:248)
	at net.sf.ehcache.store.CacheStore$1.evicted(CacheStore.java:99)
	at net.sf.ehcache.store.CacheStore$1.evicted(CacheStore.java:96)
	at net.sf.ehcache.store.cachingtier.OnHeapCachingTier$1.evicted(OnHeapCachingTier.java:86)
	at net.sf.ehcache.store.cachingtier.CountBasedBackEnd$1.removed(CountBasedBackEnd.java:103)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.internalReplace(ConcurrentHashMap.java:1346)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:2643)
	at net.sf.ehcache.store.cachingtier.CountBasedBackEnd.evictIfRequired(CountBasedBackEnd.java:149)
	at net.sf.ehcache.store.cachingtier.CountBasedBackEnd.putIfAbsent(CountBasedBackEnd.java:87)
	at net.sf.ehcache.store.cachingtier.OnHeapCachingTier.get(OnHeapCachingTier.java:172)
	at net.sf.ehcache.store.CacheStore.get(CacheStore.java:192)
	at net.sf.ehcache.Cache.get(Cache.java:1751)
	at net.sf.ehcache.Cache.get(Cache.java:1724)
	at fr.paris.lutece.portal.service.cache.AbstractCacheableService.getFromCache(AbstractCacheableService.java:121)
	at fr.paris.lutece.plugins.myportal.service.WidgetContentService.getWidgetContent(WidgetContentService.java:114)

   Locked ownable synchronizers:
	- <0x00000005d08e6798> (a java.util.concurrent.ThreadPoolExecutor$Worker)

3 threads like this:

"http-nio-8080-exec-176" #234 daemon prio=5 os_prio=0 tid=0x00007f66207b5800 nid=0x6f67 in Object.wait() [0x00007f65d58fc000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap$Node.tryAwaitLock(ConcurrentHashMap.java:687)
	- locked <0x00000005c42d1568> (a net.sf.ehcache.util.concurrent.ConcurrentHashMap$Node)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.internalReplace(ConcurrentHashMap.java:1311)
	at net.sf.ehcache.util.concurrent.ConcurrentHashMap.removeAndNotify(ConcurrentHashMap.java:2647)
	at net.sf.ehcache.store.cachingtier.CountBasedBackEnd.remove(CountBasedBackEnd.java:115)
	at net.sf.ehcache.store.cachingtier.OnHeapCachingTier.remove(OnHeapCachingTier.java:206)
	at net.sf.ehcache.store.CacheStore.remove(CacheStore.java:238)
	at net.sf.ehcache.Cache.removeInternal(Cache.java:2425)
	at net.sf.ehcache.Cache.tryRemoveImmediately(Cache.java:2186)
	at net.sf.ehcache.Cache.get(Cache.java:1756)
	at net.sf.ehcache.Cache.get(Cache.java:1724)
	at fr.paris.lutece.portal.service.cache.AbstractCacheableService.getFromCache(AbstractCacheableService.java:121)
	at fr.paris.lutece.plugins.myportal.service.WidgetContentService.getWidgetContent(WidgetContentService.java:114)

   Locked ownable synchronizers:
	- <0x00000005c13b76f0> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
	- <0x00000005c24c63a8> (a java.util.concurrent.ThreadPoolExecutor$Worker)

rzara/lutece-core,rzara/lutece-core,lutece-platform/lutece-core,lutece-platform/lutece-core,rzara/lutece-core,lutece-platform/lutece-core